Culture, People, Nature: An Introduction to General Anthropology

From inside the book

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Page 54A basic principle of evolutionary ecology, the principle of competitive exclusion,
states that two species that occupy a single habitat cannot have the same
adaptive relationship to their common ecosystem; that is, they cannot feed
themselves ...

Page 95Such differences as exist are certainly to be expected in a species which was
spread so widely over the globe and ... Three forces explain the present-day unity
of our species: natural selection, cultural selection, and migration and gene flow.

Page 110Many raciologists of the old school confer upon the races a permanency and
inner integrity that not even species deserve. Some of these old-fashioned ideas
can be traced back to pre-Darwinian times when biologists believed that species
...